1 /*

     2  * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.

     3  * Copyright 2008, 2009 Red Hat, Inc.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    21  * CA 95054 USA or visit www.sun.com if you need additional information or

    22  * have any questions.

    23  *

    24  */

    25 

    26 class ZeroEntry {

    27  public:

    28   ZeroEntry() {

    29     ShouldNotCallThis();

    30   }

    31 

    32  private:

    33   address _entry_point;

    34 

    35  public:

    36   address entry_point() const {

    37     return _entry_point;

    38   }

    39   void set_entry_point(address entry_point) {

    40     _entry_point = entry_point;

    41   }

    42 

    43  private:

    44   typedef void (*NormalEntryFunc)(methodOop method,

    45                                   intptr_t  base_pc,

    46                                   TRAPS);

    47   typedef void (*OSREntryFunc)(methodOop method,

    48                                address   osr_buf,

    49                                intptr_t  base_pc,

    50                                TRAPS);

    51 

    52  public:

    53   void invoke(methodOop method, TRAPS) const {

    54     ((NormalEntryFunc) entry_point())(method, (intptr_t) this, THREAD);

    55   }

    56   void invoke_osr(methodOop method, address osr_buf, TRAPS) const {

    57     ((OSREntryFunc) entry_point())(method, osr_buf, (intptr_t) this, THREAD);

    58   }

    59 

    60  public:

    61   static ByteSize entry_point_offset() {

    62     return byte_offset_of(ZeroEntry, _entry_point);

    63   }

    64 };